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Polluted Runoff: Nonpoint Source Pollution

Nonpoint Source Technical Exchange

The State Nutrient Reductions Strategies Web series merged with the Nonpoint Source Technical Exchange forum to cover a broader variety of NPS topics.

We are currently working with our partners on new topics and new methods of engaging in discussion on current nonpoint source technical topics of interest. Stay tuned for future announcements and in the interim below are some of our past webinars.

Next Webinar:

March 20, 2018  1:00-3:00pm Eastern 

Introduction to STEPL 4.4
Tetra Tech Inc.
( Note: registration for this  webcast is  below. It will not be through our typical Adobe connect URL) 

The webcast will  provide an overview of  STEPL  and how to use it.  It is a planning-level spreadsheet model intended to facilitate the estimation of nutrient and sediment load reductions associated with Clean Water Act Section 319 projects at a HUC-12 watershed scale.  This webinar will also cover some new enhancements in version 4.4. This new version incorporates new cropland and pastureland BMPs, accounts for flow volume reductions from urban low impact development practices, offers enhanced weather data and reporting features, and includes a new manure application worksheet.

Please register for this webinar at

Future Webinars

February/March 2018:

Monitoring for Microbial Pathogens and Indicators
Date/time TBD

Past webinars

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